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Friction stir welding solutions
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Friction stir welding solutions

The joints obtained by welding magnesium, aluminum, copper, titanium alloys or heavy steel by traditional fusion welding methods have defects such as pores and microcracks, and the heat-affected zone is wide and the deformation is large, which limits the welding structure and restricts the weldment in related fields. Wide range of applications. Friction stir welding (Friction stir welding, FSW) as a new type of solid phase welding technology can effectively solve this problem. Friction stir welding does not require filler metal, the welding heat affected zone is small, the joint deformation is small, and the welding process is free of smoke and dust pollution.
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The joints obtained by welding magnesium, aluminum, copper, titanium alloys or heavy steel by traditional fusion welding methods have defects such as pores and microcracks, and the heat-affected zone is wide and the deformation is large, which limits the welding structure and restricts the weldment in related fields. Wide range of applications. Friction stir welding (Friction stir welding, FSW) as a new type of solid phase welding technology can effectively solve this problem. Friction stir welding does not require filler metal, the welding heat affected zone is small, the joint deformation is small, and the welding process is free of smoke and dust pollution. It is a green and environmentally friendly welding technology. The working principle of friction stir welding is: during welding, the stirring head composed of the shaft shoulder and the stirring needle is inserted into the workpiece until the shaft shoulder contacts the workpiece, and the friction between the shaft shoulder and the stirring needle (mainly the shaft shoulder) and the workpiece produces a lot of friction The friction heat makes the metal around the stirring head plasticize, and at the same time, under the action of the stirring head, the metal in front of the stirring head is transferred to the rear of the stirring head, and then the friction stir weld is formed by the downward pressure forging of the shaft shoulder. The stirring head is the core component of friction stir welding. The geometry and material selection of the stirring head is very important to the performance of the workpiece joint. Tool and die steel mixing heads are generally used to weld light alloys such as aluminum and magnesium alloys. The tungsten rhenium alloy stirring head has excellent high temperature strength, toughness, and wear resistance, which can meet the needs of friction stir welding of steel, titanium, copper alloy and other materials.

1. The grade WR25 can be used for welding low alloy structural steels, such as A36, AISI1020, AISI4140, A572, HSLA80, DS980, Q235, etc.; it can also be used for welding pipeline steels, such as X80, X70; suitable for austenitic stainless steel and ferrite Body stainless steel; can be welded solid solution strengthened deformation high-temperature alloys, such as Inconel600, Inconel625, Inconel800, and Hastelloy.

2. Brand WRH25, can weld martensitic stainless steel (SS440), hot work die steel (H-13), high-strength high-temperature alloy (Inconel718).

3. Brand WL4, can weld titanium alloy and copper alloy.

4. The service life of the tungsten rhenium alloy friction stir head: the length of the welding workpiece is at least 100m and no abnormality occurs.

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